TAUNTON — A Taunton teen told police his $800 BMX bike was stolen Monday afternoon by a man who chased him down on his own bike and forced him to the pavement.

Police said the 15-year-old and his mother came to police headquarters at 9 p.m. to report the incident, which allegedly occurred at 4 p.m.

The boy, police said, claimed he was at Cumberland Farms on Broadway when he was approached by a Hispanic male with no shirt, a long goatee and beard and what appeared to be either a bruise or hickey in the area of his collar bone.

He described the man as being between 20 and 30 years of age.

The assailant, who was on a bike, alledgedly approached the boy in the parking lot and loudly accused him of “talking about my girlfriend’s (rear end).”

The teen told police he became frightened and sped off toward Coram Street but was cut off by the man who forced him to fall to the ground.

According to the alleged victim, the assailant then managed to take the custom BMX with pink and black chrome and leave the scene.

The teen urged police to review the store’s video surveillance system to help identify his robber. Police said the case remains under investigation.